/Engine/Plugins/Enterprise/DataprepEditor/Source/DataprepCore/Public/SelectionSystem/DataprepSelectionTransform.h
This function is called when the transform is executed. If your defining your transform in Blueprint or Python this is the function to override.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintNativeEvent) void OnExecution ( const [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & InObjects, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & OutObjects )